Brand Logo
Help
  • Get started
  • Ask the Community
  • How-To & Best Practices
  • Contact Support
Login / Register
Help
  • Get started
  • Ask the Community
  • How-To & Best Practices
  • Contact Support
close
  • Community Home
  • Forums
    • By Topic
    • By Topic
      EcoStruxure Building
      • Field Devices Forum
      • SmartConnector Forum
      EcoStruxure Power & Grid
      • Gateways and Energy Servers
      • Metering & Power Quality
      APC UPS, Critical Power, Cooling and Racks
      • APC UPS Data Center & Enterprise Solutions Forum
      • APC UPS for Home and Office Forum
      EcoStruxure IT
      • EcoStruxure IT forum
      Remote Operations
      • EcoStruxure Geo SCADA Expert Forum
      • Remote Operations Forum
      Industrial Automation
      • Alliance System Integrators Forum
      • AVEVA Plant SCADA Forum
      • CPG Expert Forum DACH
      • EcoStruxure Automation Expert / IEC 61499 Forum
      • Fabrika ve Makina Otomasyonu Çözümleri
      • Harmony Control Customization Forum
      • Industrial Edge Computing Forum
      • Industry Automation and Control Forum
      • Korea Industrial Automation Forum
      • Machine Automation Forum
      • Modicon PAC Forum
      • PLC Club Indonesia
      Schneider Electric Wiser
      • Schneider Electric Wiser Forum
      Power Distribution IEC
      • Eldistribution & Fastighetsautomation
      • Elektrik Tasarım Dağıtım ve Uygulama Çözümleri
      • Paneelbouw & Energie Distributie
      • Power Distribution and Digital
      • Solutions for Motor Management
      • Specifiers Club ZA Forum
      • Електропроектанти България
      Power Distribution NEMA
      • Power Monitoring and Energy Automation NAM
      Power Distribution Software
      • EcoStruxure Power Design Forum
      • LayoutFAST User Group Forum
      Light and Room Control
      • SpaceLogic C-Bus Forum
      Solutions for your Business
      • Solutions for your Business Forum
      Support
      • Ask the Community
  • Knowledge Center
    • Building Automation Knowledge Base
    • Geo SCADA Knowledge Base
    • Industrial Automation How-to videos
    • Digital E-books
    • Success Stories Corner
  • Events & Webinars
    • All Events
    • Innovation Talks
    • Innovation Summit
    • Let's Exchange Series
    • Partner Success
    • Process Automation Talks
    • Technology Partners
  • Ideas
    • EcoStruxure Building
      • EcoStruxure Building Advisor Ideas
      Remote Operations
      • EcoStruxure Geo SCADA Expert Ideas
      • Remote Operations Devices Ideas
      Industrial Automation
      • Modicon Ideas & new features
  • Blogs
    • By Topic
    • By Topic
      EcoStruxure Power & Grid
      • Backstage Access Resources
      Remote Operations
      • Remote Operations Blog
      Industrial Automation
      • Industrie du Futur France
      • Industry 4.0 Blog
      Power Distribution NEMA
      • NEMA Power Foundations Blog
      Light and Room Control
      • KNX Blog
      Knowledge Center
      • Digital E-books
      • Geo SCADA Knowledge Base
      • Industrial Automation How-to videos
      • Success Stories Corner

AP7920 firmware problems

APC UPS Data Center & Enterprise Solutions Forum

Schneider Electric support forum for our Data Center and Business Power UPS, UPS Accessories, Software, Services, and associated commercial products designed to share knowledge, installation, and configuration.

cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Show  only  | Search instead for 
Did you mean: 
  • Home
  • Communities
  • APC UPS, Critical Power, Cooling and Racks
  • APC UPS Data Center & Enterprise Solutions Forum
  • AP7920 firmware problems
Options
  • Subscribe to RSS Feed
  • Mark Topic as New
  • Mark Topic as Read
  • Float this Topic for Current User
  • Bookmark
  • Subscribe
  • Mute
  • Printer Friendly Page
Invite a Co-worker
Send a co-worker an invite to the Exchange portal.Just enter their email address and we’ll connect them to register. After joining, they will belong to the same company.
You have entered an invalid email address. Please re-enter the email address.
This co-worker has already been invited to the Exchange portal. Please invite another co-worker.
Please enter email address
Send Invite Cancel
Invitation Sent
Your invitation was sent.Thanks for sharing Exchange with your co-worker.
Send New Invite Close
Top Experts
User Count
BillP
Administrator BillP Administrator
5022
voidstar_apc
Janeway voidstar_apc
195
Erasmus_apc
Sisko Erasmus_apc
111
TheNotoriousKMP_apc
Sisko TheNotoriousKMP_apc
108
View All
Invite a Colleague

Found this content useful? Share it with a Colleague!

Invite a Colleague Invite
Solved Go to Solution
Back to APC UPS Data Center & Enterprise Solutions Forum
Solved
imark015_apc
Crewman imark015_apc
Crewman

Posted: ‎2021-07-01 07:06 AM

0 Likes
9
1204
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content
Share

Posted: ‎2021-07-01 07:06 AM

AP7920 firmware problems

This was originally posted on APC forums on 3/24/2015


Hi,

I got an AP7920, its loaded with the firmware 3.7.4 and this is loading.

After boot, some times my network settings are gone, and when i try to turn on ( or off ) port 1 for example, port 7 responds and turns off.

This happens with a lot of commands.

I can use com port and ftp. Web interface loads, but also says sometimes this: 

Communication Status
 

Communication has been lost to the device!

and after a reboot the message is gone, but then the ports act weird.

Maybe i can downgrade and look if that helps?

I need a firmware download then.

Thanks in advance,

Mark

Labels
  • Labels:
  • Racks, Rack Accessories, & Cooling
  • Tags:
  • ap7920
  • firmware
Reply
Share
  • All forum topics
  • Previous Topic
  • Next Topic

Accepted Solutions
BillP
Administrator BillP Administrator
Administrator

Posted: ‎2021-07-01 07:06 AM

0 Likes
0
1205
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content
Share

Posted: ‎2021-07-01 07:06 AM

This reply was originally posted by Angela on APC forums on 3/25/2015


Well, the application loads and part of it loading is that it establishes communication and then yours shows immediately lost. I think this is due to a failed connection rather than an "intermittent" communication between management interface and PDU relay boards/intelligence. I think the intermittent connection would cause more lost/established spamming your log.

We don't provide schematics or anything unfortunately so besides opening it up and eyeballing at your own risk to see any obvious connector problems, there is not much to do that I could suggest. We don't service these even ourselves or sell spare parts. The entire unit is just replaced for this type of product.

See Answer In Context

Reply
Share
Replies 9
Terry_Kennedy_apc
Commander Terry_Kennedy_apc
Commander

Posted: ‎2021-07-01 07:06 AM

0 Likes
0
1206
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content
Share

Posted: ‎2021-07-01 07:06 AM

This was originally posted on APC forums on 3/25/2015


That's an odd one. There are 3 pieces of firmware involved, the AOS and APP (which is what you upgrade with a firmware update) and the firmware on the relay board (which you can't see directly).

The "communication lost" and the wrong outlet switching would normally indicate a problem on the relay board, but losing the network configuration indicates a problem on the management board. The only thing I could think of (bear in mind I'm just a user, not an APC employee) is that the NVRAM on the management board is having trouble storing the configuration. An incorrect baud rate on the internal port would give you the "communication lost" error. I suppose a power supply problem could also cause this, but these units have redundant power supplies.

I assume it has been running 3.7.4 for some time, and the problem only started happening recently? If you updated the firmware and the problem started happening soon after, I'd suspect a bad firmware load and would suggest retrying the update process. However, the firmware on these is pretty good at detecting when it has become corrupted.

Angela will probably want the event.txt from the device (available via FTP). A copy of the config.ini both before and after the problem happens might also be useful.

If this unit is in warranty, replacing it might be the easiest / fastest solution.

Reply
Share
imark015_apc
Crewman imark015_apc
Crewman

Posted: ‎2021-07-01 07:06 AM

0 Likes
0
1206
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content
Share

Posted: ‎2021-07-01 07:06 AM

This was originally posted on APC forums on 3/25/2015


Hi

I got the pdu from someone who already had trouble with it, so I do not have a config.ini before the problems. I updated the firmware to 3.7.4, and then it got even worse. 

It is also turning on and off random ports at random times, and the number display shows nothing, it is off.

Reply
Share
imark015_apc
Crewman imark015_apc
Crewman

Posted: ‎2021-07-01 07:06 AM

0 Likes
0
1196
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content
Share

Posted: ‎2021-07-01 07:06 AM

This was originally posted on APC forums on 3/25/2015


This is the about screen:

About System

Model Number : AP7920
Serial Number : ZA0525014021
NMC Serial Number : ZA0525007101
Manufacture Date : 06/16/2005
Hardware Revision : B2
MAC Address : 00 C0 B7 77 1C D3
Flash Type : TOS TC58FVM5B2

Press to continue...

-----------------------------------------------------------------------
Module Information

Description : Rack PDU APP
-----------------------------------------------------------------------
Name : rpdu Type : StatApp
Version : 374 Sector : 16
Date : 03/13/2012 Time : 16:16:54
CRC16 : 4D49

Press to continue...

Description : Network Management Card AOS
-----------------------------------------------------------------------
Name : aos Type : APC OS
Version : 374 Sector : 47
Date : 11/09/2011 Time : 11:45:09
CRC16 : 49C6

The display now shows 88, and i tried to turn on port 1, and port one stayed off, and 2 to 8 turned on.. 

Nothing is connected.

Reply
Share
imark015_apc
Crewman imark015_apc
Crewman

Posted: ‎2021-07-01 07:06 AM

0 Likes
0
1206
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content
Share

Posted: ‎2021-07-01 07:06 AM

This was originally posted on APC forums on 3/25/2015


Discovered something. There is NO config.ini ! 

and now i see this.


Description : Network Management Card AOS
-----------------------------------------------------------------------
Name : aos Type : APC OS
Version : 374 Sector : 16
Date : 11/09/2011 Time : 11:45:09
CRC16 : 49C6

Press to continue...

Description : Network Management Card AOS
-----------------------------------------------------------------------
Name : aos Type : APC OS
Version : 374 Sector : 47
Date : 11/09/2011 Time : 11:45:09
CRC16 : 49C6

2 AOS.

Reply
Share
BillP
Administrator BillP Administrator
Administrator

Posted: ‎2021-07-01 07:06 AM

0 Likes
0
1206
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content
Share

Posted: ‎2021-07-01 07:06 AM

This reply was originally posted by Angela on APC forums on 3/25/2015


This device is about 10 years old. When you had the correct firmware on it, it sounded like the problem was the network management interface couldn't talk to the relay boards which can happen over time if the connector is damaged or has failed due to age.

With this latest information where you have two AOS, you need to get the apc_hw02_rpdu_374.bin file (which it sounds like you have since it would've been in the .exe you downloaded) and go ahead and FTP that to the Rack PDU and it should be fine afterwards - in the sense of proper firmware being loaded. When you do that, I'd want to see the event log.

Instructions on fixing firmware/manual FTP are here -> http://www.apc.com/support/index?page=content&country=ITB〈=en&locale=en_US&id=FA156047 

Instructions on downloading logs -> http://www.apc.com/support/index?page=content&country=ITB〈=en&locale=en_US&id=FA156131

Reply
Share
imark015_apc
Crewman imark015_apc
Crewman

Posted: ‎2021-07-01 07:06 AM

0 Likes
0
1196
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content
Share

Posted: ‎2021-07-01 07:06 AM

This was originally posted on APC forums on 3/25/2015


Hi, i also noticed the rpdu file was gone, so i put it back a few moments ago, but now my serial connection doesnt work anymore, so i cannot logon. it responds to ping, and the telnet window closes randomly.

And a few seconds ago it randomly reboots and it turned all ports on. 

display is still off.

following Abouts:


-----------------------------------------------------------------------
About System

Model Number : AP7920
Serial Number : ZA0525014021
NMC Serial Number : ZA0525007101
Manufacture Date : 06/16/2005
Hardware Revision : B2
MAC Address : 00 C0 B7 77 1C D3
Flash Type : TOS TC58FVM5B2

Press to continue...

-----------------------------------------------------------------------
Module Information

Description : Rack PDU APP
-----------------------------------------------------------------------
Name : rpdu Type : StatApp
Version : 374 Sector : 16
Date : 03/13/2012 Time : 16:16:54
CRC16 : 4D49

Press to continue...

Description : Network Management Card AOS
-----------------------------------------------------------------------
Name : aos Type : APC OS
Version : 374 Sector : 47
Date : 11/09/2011 Time : 11:45:09
CRC16 : 49C6

I am downloading the logs now.

I also noticed config.ini is there now.

Reply
Share
BillP
Administrator BillP Administrator
Administrator

Posted: ‎2021-07-01 07:06 AM

0 Likes
0
1206
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content
Share

Posted: ‎2021-07-01 07:06 AM

This reply was originally posted by Angela on APC forums on 3/25/2015


Thanks. Yes, you will only see the log files for the most part, definitely config.ini and data.txt, if you have APP file loaded (rpdu in this example).

The event log looks pretty normal but... 

Switched Rack PDU: Communications lost.	0x0F08

I expected to see a log full of communications lost/established but it is fairly infrequent and just a persistent lost communication problem. Even so, when you see this frequently or when it is persistent, what I said earlier is true - the management interface cannot talk to the outlet relays and the outlet relays are energized/controlled by the management interface. I see it as one of the more recent events at the top of the log and this isn't good. When there is a communication loss between the two components, then the outlets can be unpredictable. Also, their "normal" state is open/off and not passing power.

You'll likely have unpredictable outlet control with this issue and we'd generally recommend a replacement for this issue since these aren't field serviceable.

Reply
Share
imark015_apc
Crewman imark015_apc
Crewman

Posted: ‎2021-07-01 07:06 AM

0 Likes
0
1206
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content
Share

Posted: ‎2021-07-01 07:06 AM

This was originally posted on APC forums on 3/25/2015


This log file is downloaded a few seconds after the installation of the application, so that could mean why the log file doesnt show it that often?

Is there any other way i might get it fixed?

I dont mind spending a lot of time on it.

Reply
Share
BillP
Administrator BillP Administrator
Administrator

Posted: ‎2021-07-01 07:06 AM

0 Likes
0
1206
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content
Share

Posted: ‎2021-07-01 07:06 AM

This reply was originally posted by Angela on APC forums on 3/25/2015


Well, the application loads and part of it loading is that it establishes communication and then yours shows immediately lost. I think this is due to a failed connection rather than an "intermittent" communication between management interface and PDU relay boards/intelligence. I think the intermittent connection would cause more lost/established spamming your log.

We don't provide schematics or anything unfortunately so besides opening it up and eyeballing at your own risk to see any obvious connector problems, there is not much to do that I could suggest. We don't service these even ourselves or sell spare parts. The entire unit is just replaced for this type of product.

Reply
Share
Preview Exit Preview

never-displayed

You must be signed in to add attachments

never-displayed

Additional options
You do not have permission to remove this product association.
 
To The Top!

Forums

  • APC UPS Data Center Backup Solutions
  • EcoStruxure IT
  • EcoStruxure Geo SCADA Expert
  • Metering & Power Quality
  • Schneider Electric Wiser

Knowledge Center

Events & webinars

Ideas

Blogs

Get Started

  • Ask the Community
  • Community Guidelines
  • Community User Guide
  • How-To & Best Practice
  • Experts Leaderboard
  • Contact Support
Brand-Logo
Subscribing is a smart move!
You can subscribe to this forum after you log in or create your free account.
Forum-Icon

Create your free account or log in to subscribe to the forum - and gain access to more than 10,000+ support articles along with insights from experts and peers.

Register today for FREE

Register Now

Already have an account?Login

Terms & Conditions Privacy Notice Change your Cookie Settings © 2023 Schneider Electric, Inc